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package org.aoju.bus.health.unix.aix.drivers.perfstat;

import com.sun.jna.platform.unix.aix.Perfstat;
import com.sun.jna.platform.unix.aix.Perfstat.perfstat_memory_total_t;
import org.aoju.bus.core.annotation.ThreadSafe;

/**
 * Utility to query performance stats for memory
 *
 * @author Kimi Liu
 * @version 6.5.0
 * @since Java 17+
 */
@ThreadSafe
public final class PerfstatMemory {

    private static final Perfstat PERF = Perfstat.INSTANCE;

    /**
     * Queries perfstat_memory_total for total memory usage statistics
     *
     * @return usage statistics
     */
    public static perfstat_memory_total_t queryMemoryTotal() {
        perfstat_memory_total_t memory = new perfstat_memory_total_t();
        int ret = PERF.perfstat_memory_total(null, memory, memory.size(), 1);
        if (ret > 0) {
            return memory;
        }
        return new perfstat_memory_total_t();
    }

}
